Chemical Reactions

2. point the temperature at which a substance changes from the liquid phase to the gas phase
5. a structure formed by repeating groups of atoms that link together in a large network
7. formula letters and numbers showing the types and number of atoms that repeat to make up a substance
9. to change the order or position of something
10. able to cause damage
11. a group of atoms joined together in a particular way
12. an ending substance that is made during a chemical reaction
14. a starting substance that is part of a chemical reaction

1. the temperature at which a substance changes from the solid phase to the liquid phase
3. the relative size of things
4. a substance that is added to soil to help plants grow
6. a process in which atoms rearrange to form new substances
8. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
13. something that can be observed about a substance, such as color, smell, or boiling point
15. the tiny pieces that all matter—all the stuff in the world—is made of